Drop Gyro tool can be run without the need for expensive conveyance. The tool can be dropped from surface and retrieved with the drill pipe / tubing ( Memory) without the need for pumping or a drop parachute. Unlike other downhole Gyro survey tools, ECPS Drop gyro is not affected by magnetic interference and therefore not require a non-magnetic drill collars to perform a survey and it can be run inside drill pipe ,casing and tubing (Memory) .